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Friday, 9 October

NEET UG 2018 · Chemistry · Question 68

NEET 2018 Chemistry, question 68

Question 68 of the NEET 2018 paper (code AA) is a Chemistry question from Alcohols, Phenols and Ethers. Its idea, Iodoform Test, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 1.

Updated 2026-10-08

Q68 · Chemistry

Compound A, C8H10O\mathrm{C_8H_{10}O}, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell.

A and Y are respectively

The figure, described in words

Options drawn as benzene-ring structures: 1-phenylethanol, 2-phenylethanol, p-methylbenzyl alcohol, 2,4-dimethylphenol (each with I2).

  1. 1C6H5−CH(OH)−CH3\mathrm{C_6H_5-CH(OH)-CH_3} and I2\mathrm{I_2}Official answer
  2. 2C6H5−CH2−CH2−OH\mathrm{C_6H_5-CH_2-CH_2-OH} and I2\mathrm{I_2}
  3. 3H3C−C6H4−CH2−OH\mathrm{H_3C-C_6H_4-CH_2-OH} (p-methylbenzyl alcohol) and I2\mathrm{I_2}
  4. 4CH3−C6H3(CH3)−OH\mathrm{CH_3-C_6H_3(CH_3)-OH} (2,4-dimethylphenol) and I2\mathrm{I_2}

Official answer: option 1 · CBSE official answer key

Same idea

The only question on Iodoform Test

No other NEET paper from 2017–2026 tested this exact idea.

Iodoform Test: every question and how it was framed

The chapter

Alcohols, Phenols and Ethers in ten years of NEET

15 questions from 2017–2026, asked in 7 of 10 papers, about 1.4 a paper. Alcohols and Phenols alone had 15.

Chapter analysisStudy this chapterPractise this chapter

Alcohols, Phenols and Ethers: questions per paper

0242’174’182’192’200’212’222’231’240’250’26